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Related Concept Videos

Pharmacokinetics: Drug–Drug Interactions01:25

Pharmacokinetics: Drug–Drug Interactions

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Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
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Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

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When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
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Dosage Regimen: Individualization01:24

Dosage Regimen: Individualization

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Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
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Drug Dosing: Geriatric Patients01:15

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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
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Factors Affecting Protein-Drug Binding: Drug Interactions01:23

Factors Affecting Protein-Drug Binding: Drug Interactions

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Drug interactions are a critical aspect of pharmacology and can occur when two or more drugs compete for the same binding site. This competition can result in one drug displacing another, altering the effect of the displaced drug. Drug interactions are complex processes that rely heavily on how much of the displacer drug is present and how strongly it can bind to the same sites as the displaced drug.
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A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of...
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Standardizing and Comparing Management Recommendations for Potential Drug-Drug Interactions Across Different

Lelio Crupi1,2, Louis Letinier3, Vianney Jouhet4

  • 1Université de Bordeaux, INSERM, BPH, Team AHeaD, INSERM U1219, 33000, Bordeaux, France.

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Potential drug-drug interactions (pDDIs) are common, especially in older adults. This study developed a new scale to classify pDDI management, finding that interaction checkers show moderate agreement, highlighting a need for standardization.

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Area of Science:

  • Pharmacology
  • Clinical Pharmacy
  • Health Informatics

Background:

  • Potential drug-drug interactions (pDDIs) pose significant risks in clinical settings, particularly for elderly patients.
  • Accurate identification and management of pDDIs are critical for ensuring patient safety.
  • Current interaction checkers (ICs) used by prescribers may offer inconsistent recommendations, potentially impacting clinical decision-making.

Purpose of the Study:

  • To develop a standardized method for classifying and prioritizing pDDIs based on clinical management relevance.
  • To compare the categorization of pDDIs across various interaction checkers.

Main Methods:

  • A structured, iterative process was used to create a scale classifying pDDIs into four management categories.
  • The scale was based on management recommendations from six interaction checkers.
  • The scale was applied to 218 real-world pDDIs from 1923 patients, with agreement assessed using Gwet's AC1 statistic.

Main Results:

  • Overall agreement among interaction checkers was moderate (Gwet's AC1 = 0.44).
  • Agreement improved when dichotomizing the scale into high/intermediate versus low priority (AC1 = 0.72).
  • Classification agreement for high-priority pDDIs was also higher (AC1 = 0.62).

Conclusions:

  • A systematic approach was developed and tested to compare pDDI management across interaction checkers.
  • The study identified generally limited agreement between interaction checkers.
  • Findings underscore the need for harmonized approaches to improve consistent, evidence-based pDDI management.